- High temporal resolution: 1000 – 2000 frames / sec
- Relative to 2D echo, which is typically 30-100 frames / sec
B-bump
B-bump on M-mode indicates elevated LVEDP

L-wave
L wave on M-mode is suggestive of marked sinus bradycardia or CHB

B-bump on M-mode indicates elevated LVEDP

L wave on M-mode is suggestive of marked sinus bradycardia or CHB
